Use as much chicken as you like; I used a combination of breasts and thighs.,______,In a baking dish, lay out the chicken and cover with roughly 3/4 of the mustard mixture; turn and coat each piece.,Reserve the remaining 1/4 mustard mixture for basting.,Place in a 450 degrees F oven uncovered for 40 minutes.,At approximately 10 minutes remaining of cooking time, baste the chicken with the remaining mustard sauce.